This is one of those programs you just happen to stumble upon but you know you have to at least give it a shot. Mario Paint Composer allows you to create your own Nintendo inspired tune using the old SNES Mario Paint-ish layout. Even if you don’t have a musical skill in your entire body, it is fun just to drag and drop things onto the board and then hit play.
It is both Mac and Windows friendly too. Just download, unzip and you’ll be off on your own music creating adventure. Here is an example video I found via the ‘ol YouTube:
i would love to make a mario song